I had a chance to use the 20V cordless sprayer this week and for the most part it worked as I had hoped it would. It was great to be able to just spray weed killer and not have to stop and pump up the pressure.
I gave 4 starts because the shoulder strap that came with the sprayer is pretty much worthless as it is not long enough to be usable.
Fully extended, the strap put the top of the pump about 6" below my armpit. I ended up carrying it by the handle rather than trying to use the strap. I'm now looking for a longer shoulder strap to replace what came with the sprayer.
I also had a minor leak where the hose attaches to the tank that I hope a little silicone grease for o-rings will take care of the issue. Time will tell.
Overall, I'm pleased with the sprayer and would recommend it but would also warn any prospective buyers of the issues I have had with the sprayer.